The utility model is suitable for the technical field of injectors and provides an injection pen auxiliary
assembly and an injection pen, the injection pen auxiliary
assembly is used for being matched with a pre-filling and sealing clamping type
bottle for use, and the pre-filling and sealing clamping type
bottle comprises a
medicine cylinder, a needle head arranged at the far end of the
medicine cylinder, a needle cap arranged outside the needle head in a sleeving mode and a
piston arranged in the near end of the
medicine cylinder in a sliding mode; the injection pen auxiliary
assembly comprises a shell, a first locking piece and a second locking piece, and the first locking piece and the pre-filling clamping type
bottle are sequentially arranged in the shell in the direction from the near end of the shell to the far end of the shell; the second locking piece is used for pushing the
piston to move from the near end of the medicine cylinder to the far end of the medicine cylinder so as to complete medicine injection in the medicine cylinder; when injection is completed, the second locking piece is contained in the shell, and the second locking piece and the first locking piece are locked. The
piston is pushed through the second locking piece for injection, the second locking piece is contained in the shell after injection is completed, the first locking piece and the second locking piece are locked, and disposable use is achieved.